New Delhi: With 2,700 domestic breeding checkers (DBCs) on strike, the city has been rendered doubly vulnerable to the dengue demon. Add to this the sporadic rain, which has only made matters worse. DBCs say that they have not been paid their salaries for months now. Moreover, they have demanded that they be given permanent employment. On Monday, the issue of rising dengue cases as also the DBC strike figured in the House meeting also. It was alleged by Congress councillor Farhad Suri that DBCs had been provided with identity cards to carry out checking only 15 days ago and basic equipment like torches, dipper, stationary were not even made available to them. Said Suri: